Start with current foot or body measurements. Kids grow quickly, age labels vary, and the exact brand or product chart remains the controlling reference.
How it works: Measure both feet and use the longer one for shoes; for clothing, record current height and chest rather than relying only on age.
Source Basis: Foot measurement: ISO 9407:2019 · children’s body-measurement definitions: ISO 8559-1:2017. Confidence Level: Physical measurements have the strongest basis; regional shoe labels and age-based clothing labels are approximate.
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